12001110012 has 96 divisors (see below), whose sum is σ = 31576796160. Its totient is φ = 3990382704.

The previous prime is 12001110007. The next prime is 12001110013. The reversal of 12001110012 is 21001110021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12001109976 and 12001110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001110013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4048843 + ... + 4051805.

It is an arithmetic number, because the mean of its divisors is an integer number (328924960).

Almost surely, 2^12001110012 is an apocalyptic number.

12001110012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001110012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15788398080).

12001110012 is an abundant number, since it is smaller than the sum of its proper divisors (19575686148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001110012 is an equidigital number, since it uses as much as digits as its factorization.

12001110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3431 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12001110012 its reverse (21001110021), we get a palindrome (33002220033).

Subtracting 12001110012 from its reverse (21001110021), we obtain a palindrome (9000000009).

The spelling of 12001110012 in words is "twelve billion, one million, one hundred ten thousand, twelve".